Detector Maps
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Open the mapTowns, schools, churches, post offices, and cemeteries, colored by the era they were established — with one switch to show only what's been abandoned. Old home site research that used to take weekends now takes minutes.
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Historic Established Places puts towns, post offices, churches, schools, cemeteries and mines on your map nationwide, each one colored by the era it dates from. A 25-year era slider runs from Pre-1800 to 1925–50, and an Abandoned-only switch hides everything still in use — leaving just the places that closed, moved or faded away.
Historic Established Places maps towns, post offices, churches, schools, cemeteries, and mines — each colored by the era it was established. Drag the 25-year time slider from Pre-1800 through 1925–50 and watch settlement sweep across your county.

The Abandoned only switch strips the map back to discontinued places: post offices that closed, schools that emptied, churches that faded off the modern map. Stack it with Ghost Towns — historic towns and populated places from the USGS GNIS gazetteer — and the empty spots start making sense.
Found a promising abandoned school? Step the entire basemap back through the decades with Historic USGS Topo — 1870s to 2000s — and see what the surveyors mapped there before it disappeared. If the old topo agrees, your research just got a lot stronger.
Zoom to 14+ and Property Boundaries show parcel and owner details, so your permission ask starts with a name. Everything syncs between web and mobile, and works offline in the field.
Property boundaries and land access are included with Pro.

Drag the era slider back and the map drops anything established after your cutoff. What's left are the older places most relic hunters want to research first — early towns, churches and crossroads communities.
Flip the Abandoned-only switch and the discontinued post offices and shuttered schools stand out from everything still operating. A closed post office marks where a whole community once collected its mail, and old schoolyards saw decades of daily foot traffic.
Narrow the slider to a single bucket — say 1850–75 — and study just the places from that window. It's a clean way to build a hunt list around one specific period instead of scrolling past everything at once.
Spotted an abandoned church site on private ground? Zoom to 14+ with Property Boundaries on and you get parcel lines with owner details, so you know exactly whose door to knock on for permission.
It means the place was discontinued — the post office closed, the school consolidated, the town lost its reason to exist. It doesn't mean the land is empty or open to detecting today, so always check ownership and get permission before you swing.
The slider moves in 25-year steps, from Pre-1800 up through 1925–50, and every place on the map is colored to match its bucket. That makes it easy to spot, say, an 1850–75 settlement sitting in a sea of later development.
Yes — the layer is nationwide. Density follows settlement history, so the East runs thick with early-era places while much of the West leans toward later boom-and-bust sites, but the era slider and Abandoned-only switch work the same everywhere.
You can. Flip the basemap to Historic USGS Topo and step the decade slider to match your era bucket, or overlay one of the 9,500+ georeferenced Rumsey maps with its own opacity control. A marker sitting on a map drawn while the place was alive tells you far more than a modern basemap can.
Historical map imagery courtesy of the David Rumsey Map Collection
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